From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from sog-mx-4.v43.ch3.sourceforge.com ([172.29.43.194] helo=mx.sourceforge.net) by sfs-ml-1.v29.ch3.sourceforge.com with esmtp (Exim 4.76) (envelope-from ) id 1VdkpY-0000No-CH for bitcoin-development@lists.sourceforge.net; Tue, 05 Nov 2013 17:54:20 +0000 Received-SPF: pass (sog-mx-4.v43.ch3.sourceforge.com: domain of gmail.com designates 209.85.214.171 as permitted sender) client-ip=209.85.214.171; envelope-from=mh.in.england@gmail.com; helo=mail-ob0-f171.google.com; Received: from mail-ob0-f171.google.com ([209.85.214.171]) by sog-mx-4.v43.ch3.sourceforge.com with esmtps (TLSv1:RC4-SHA:128) (Exim 4.76) id 1VdkpX-00014S-Ke for bitcoin-development@lists.sourceforge.net; Tue, 05 Nov 2013 17:54:20 +0000 Received: by mail-ob0-f171.google.com with SMTP id wn1so8934313obc.16 for ; Tue, 05 Nov 2013 09:54:14 -0800 (PST) MIME-Version: 1.0 X-Received: by 10.60.173.205 with SMTP id bm13mr19689817oec.25.1383674054242; Tue, 05 Nov 2013 09:54:14 -0800 (PST) Sender: mh.in.england@gmail.com Received: by 10.76.156.42 with HTTP; Tue, 5 Nov 2013 09:54:14 -0800 (PST) In-Reply-To: References: <20131105170541.GA13660@petertodd.org> <20131105171445.GA13710@petertodd.org> Date: Tue, 5 Nov 2013 18:54:14 +0100 X-Google-Sender-Auth: SrOYi0wXGuSFgQotRdJN5heIppk Message-ID: From: Mike Hearn To: Ittay Content-Type: multipart/alternative; boundary=089e011607067cfe1504ea71b836 X-Spam-Score: -0.5 (/) X-Spam-Report: Spam Filtering performed by mx.sourceforge.net. See http://spamassassin.org/tag/ for more details. -1.5 SPF_CHECK_PASS SPF reports sender host as permitted sender for sender-domain 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (mh.in.england[at]gmail.com) -0.0 SPF_PASS SPF: sender matches SPF record 0.0 URIBL_BLOCKED ADMINISTRATOR NOTICE: The query to URIBL was blocked. See http://wiki.apache.org/spamassassin/DnsBlocklists#dnsbl-block for more information. [URIs: cornell.edu] 1.0 HTML_MESSAGE BODY: HTML included in message 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature X-Headers-End: 1VdkpX-00014S-Ke Cc: Bitcoin Dev , Gavin Andresen , =?UTF-8?Q?Emin_G=C3=BCn_Sirer?= Subject: Re: [Bitcoin-development] BIP proposal - patch to raise selfish mining threshold. X-BeenThere: bitcoin-development@lists.sourceforge.net X-Mailman-Version: 2.1.9 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 05 Nov 2013 17:54:20 -0000 --089e011607067cfe1504ea71b836 Content-Type: text/plain; charset=UTF-8 On Tue, Nov 5, 2013 at 6:43 PM, Ittay wrote: > The attack can be easily hidden. And be sure that before today, today, > and after today, very smart people are at their computer planning attacks > on Bitcoin. Exploits must be published and fixed FAST. > I think it would be helpful if you actually implemented and pulled off this attack, by becoming the dominant miner capable of reversing spends at will. Then we'd know how quickly it can be done. --089e011607067cfe1504ea71b836 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
On Tue, Nov 5, 2013 at 6:43 PM, Ittay &l= t;ittay.eyal@co= rnell.edu> wrote:
The attack can be easily hidden. And be sure tha= t before today, today,=C2=A0
and after = today, very smart people are at their computer planning attacks=C2=A0
on Bitcoin. Exploits must be published and fixed FAST.=C2=A0

I think it would be helpful = if you actually implemented and pulled off this attack, by becoming the dom= inant miner capable of reversing spends at will. Then we'd know how qui= ckly it can be done.



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